An injection element for injecting a fluid into a tank

Abstract

An injection element for injecting a fluid into a tank, especially for injecting water into the tank, especially into a fish tank, wherein the injection element comprises an outer pipe and an inner pipe arranged at least partially inside the outer pipe, wherein the inner pipe is extractable at least partially out of an outlet end of the outer pipe, wherein an inlet end of the outer pipe is configured to be connected with a fluid providing device, wherein the outer pipe is configured to be arranged mainly outside of an interior volume of the tank and an outlet end of the outer pipe is configured to be connected with an opening in a wall of the tank.

1 . An injection element for injecting a fluid into a tank, especially for injecting water into the tank, especially into a fish tank,
 wherein the injection element comprises an outer pipe and an inner pipe arranged at least partially inside the outer pipe,   wherein the inner pipe is extractable at least partially out of an outlet end of the outer pipe,   wherein an inlet end of the outer pipe is configured to be connected with a fluid providing device, and   wherein the outer pipe is configured to be arranged mainly outside of an interior volume of the tank and an outlet end of the outer pipe is configured to be connected with an opening in a wall of the tank wherein the injection element is so configured that it always have a fluid communication to the tank regardless of the extraction of the inner pipe.   
     
     
         2 . The injection element according to  claim 1 , wherein the outer pipe is configured to be arranged such that
 the outer pipe does not project through the wall of the tank into the interior volume of the tank,   in a first state, the inner pipe does not project through the wall of the tank into the interior volume of the tank, and   in a second state, in which the inner pipe is at least partially extracted out of the outlet end of the outer pipe, the inner pipe projects at least partially through the wall of the tank into the interior volume of the tank,   
     
     
         3 . The injection element according to  claim 2 , wherein the outer pipe is configured to be arranged such that, in the first state, the outlet end of the outer pipe and/or an outlet end of the inner pipe are arranged flush with an inner surface of the wall of the tank. 
     
     
         4 . The injection element according to  claim 1 , configured such that a flow pattern of a fluid flow inside the interior volume of the tank is adjustable by moving the inner pipe relative to the outer pipe. 
     
     
         5 . The injection element according to  claim 1 , wherein the injection element is configured such that a position of the inner pipe, particularly a position of an outlet end of the inner pipe, is adjustable relative to the outlet end of the outer pipe and/or to the wall of the tank and/or to a circumference of the tank and/or to a centre of the tank. 
     
     
         6 . An injection system for injecting a fluid into a tank comprising at least two injection elements according to  claim 1 , wherein the at least two injection elements are configured to be arranged at predetermined positions relative to the wall of the tank. 
     
     
         7 . The injection system according to  claim 6 , configured such that the inner pipes of the at least two injection elements are simultaneously extractable at least partially out of the corresponding outlet ends of the outer pipes of the at least two injection elements. 
     
     
         8 . The injection system according to  claim 6 , comprising an injection element row with at least two injection elements configured to be arranged in a vertical row or at least essentially in a vertical row relative to the wall of the tank, particularly comprising at least two injection element rows configured to be arranged at predetermined positions relative to a circumference of the wall of the tank, 
     
     
         9 . A tank, especially a fish tank, comprising at least one injection element for injecting a fluid into a tank, especially for injecting water into the tank,
 wherein the injection element comprises an outer pipe and an inner pipe arranged at least partially inside the outer pipe,   wherein the inner pipe is extractable at least partially out of an outlet end of the outer pipe,   wherein an inlet end of the outer pipe is configured to be connected with a fluid providing device, and   wherein the outer pipe is configured to be arranged mainly outside of an interior volume of the tank and an outlet end of the outer pipe is configured to be connected with an opening in a wall of the tank, wherein the injection element is so configured that it always have a fluid communication to the tank regardless of the extraction of the inner pipe,   and/or an injection system according to  claim 6 .   
     
     
         10 . The tank according to  claim 9 , wherein an opening is provided in the wall of the tank for each injection element, wherein each of these openings is configured to be blocked by a cover element. 
     
     
         11 . A method of operating a tank, particularly a fish tank, with an injection element according to  claim 1 , comprising the steps of:
 in a first state, controlling the injection element such that the inner pipe of the injection element does not project through the wall of the tank into the interior volume of the tank, and   in a second state, controlling the injection element such that the inner pipe of the injection element projects at least partially into the interior volume of the tank.   
     
     
         12 . The method according to  claim 11 , further comprising:
 adjusting a flow pattern of a fluid flow inside the interior volume of the tank by moving the inner pipe relative to the outer pipe.   
     
     
         13 . The method according to  claim 11 , further comprising:
 adjusting a position of the inner pipe, particularly a position of the outlet end of the inner pipe, relative to an outlet end of the outer pipe and/or to the wall of the tank and/or to a circumference of the tank and/or to a centre of the tank.   
     
     
         14 . The method according to  claim 13 , further comprising:
 adjusting an injection angle of fluid injected into the interior volume of the tank via the injection element in dependence of the position of the inner pipe, particularly in dependence of the position of the outlet end of the inner pipe, particularly adjusting a circular speed of the fluid in the tank in dependence of the injection angle.   
     
     
         15 . The method according to  claim 11 , further comprising:
 designing dimensions of the injection element, comprising a length of the outer pipe and the inner pipe and/or a shape and size of a cross section of the outer pipe and the inner pipe and/or a radius of curvature of the outer pipe and the inner pipe, in dependence of the tank and/or in dependence of a desired hydraulic behaviour in the interior volume of the tank.